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Marino LV, Harris A, Johnstone C, Friend A, Newell C, Miles EA, Lucas JS, Calder PC, Walker WT. Characterising the nutritional status of children with primary ciliary dyskinesia. Clin Nutr 2018; 38:2127-2135. [PMID: 30243504 DOI: 10.1016/j.clnu.2018.08.034] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 07/28/2018] [Accepted: 08/25/2018] [Indexed: 12/22/2022]
Abstract
INTRODUCTION Primary ciliary dyskinesia (PCD) is a rare, heterogeneous genetic disorder where impaired mucociliary clearance is caused by dysfunctional motile cilia leading to bronchiectasis. There is limited evidence characterising the nutritional status of children with PCD, although lower body mass index (BMI) z-score has been associated with worse lung function (FEV1). METHODS All children (n = 43) with PCD, aged <16 years, from a single tertiary centre were prospectively enrolled. Information on clinical phenotype and nutritional status including bioelectrical impedance spectroscopy (BIS) phase-angle was collected. RESULTS There was a weak positive association between height-for-age z-score (HAZ) and FEV1 z-score (n = 28, r = 0.4, p = 0.049). Those with a low fat free mass index (<-2 z scores) had a lower BMI z score (-1.3 ± 1.2 vs. 0.8 ± 0.7, p = 0.0002). BIS phase angle identified more patients at nutritional risk than using moderate malnutrition cut-offs of either HAZ or BMI ≤ -2 z scores alone (21% vs. 4.6% vs. 6.9% respectively). PCD patients had a higher incidence of vitamin D insufficiency (<50 nmoL/L) (54%) and deficiency (<30 nmoL/L) (26%) than healthy children. CONCLUSIONS We have characterised the nutritional phenotype of a cohort of children with PCD. Monitoring vitamin D levels is important in PCD patients. There is a weak association between lung function and nutritional status, and measures of BIS phase-angle. The use of BIS phase-angle may allow for early identification of at risk children and may therefore be of benefit for nutritional assessments in the clinical setting. These findings will help inform a future nutritional intervention strategy in children with PCD.
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Affiliation(s)
- L V Marino
- Department of Dietetics/Speech and Language Therapy, University Hospital Southampton NHS Foundation Trust, Southampton, UK; NIHR Southampton Biomedical Research Centre, University Hospital Southampton NHS Foundation Trust and University of Southampton, Southampton, UK.
| | - A Harris
- Primary Ciliary Dyskinesia Centre, University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - C Johnstone
- Department of Dietetics/Speech and Language Therapy, University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - A Friend
- Primary Ciliary Dyskinesia Centre, University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - C Newell
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton NHS Foundation Trust and University of Southampton, Southampton, UK
| | - E A Miles
- Human Development & Health Academic Unit, Faculty of Medicine, University of Southampton, Southampton, UK
| | - J S Lucas
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton NHS Foundation Trust and University of Southampton, Southampton, UK; Primary Ciliary Dyskinesia Centre, University Hospital Southampton NHS Foundation Trust, Southampton, UK; Clinical and Experimental Sciences Academic Unit, Faculty of Medicine, University of Southampton, Southampton, UK
| | - P C Calder
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton NHS Foundation Trust and University of Southampton, Southampton, UK; Human Development & Health Academic Unit, Faculty of Medicine, University of Southampton, Southampton, UK
| | - W T Walker
- NIHR Southampton Biomedical Research Centre, University Hospital Southampton NHS Foundation Trust and University of Southampton, Southampton, UK; Primary Ciliary Dyskinesia Centre, University Hospital Southampton NHS Foundation Trust, Southampton, UK; Clinical and Experimental Sciences Academic Unit, Faculty of Medicine, University of Southampton, Southampton, UK
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Bornhorst M, Jecrois E, Mugayo DK, Zheng W, Stasheff S, Mateas P, Friend A, Zhu Y. NFM-14. IDENTIFICATION OF A THERAPEUTIC TIME WINDOW THAT IMPROVES VISION IN AN NF1-DEFICIENT OPTIC PATHWAY GLIOMA MOUSE MODEL. Neuro Oncol 2018. [DOI: 10.1093/neuonc/noy059.522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
| | - Emma Jecrois
- Children’s National Medical Center, Washington, DC, USA
| | | | - Wang Zheng
- Children’s National Medical Center, Washington, DC, USA
| | | | | | - Austin Friend
- Children’s National Medical Center, Washington, DC, USA
| | - Yuan Zhu
- Children’s National Medical Center, Washington, DC, USA
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Dick S, Friend A, Dynes K, AlKandari F, Doust E, Cowie H, Ayres JG, Turner SW. A systematic review of associations between environmental exposures and development of asthma in children aged up to 9 years. BMJ Open 2014; 4:e006554. [PMID: 25421340 PMCID: PMC4244417 DOI: 10.1136/bmjopen-2014-006554] [Citation(s) in RCA: 104] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
OBJECTIVES Childhood asthma is a complex condition where many environmental factors are implicated in causation. The aim of this study was to complete a systematic review of the literature describing associations between environmental exposures and the development of asthma in young children. SETTING A systematic review of the literature up to November 2013 was conducted using key words agreed by the research team. Abstracts were screened and potentially eligible papers reviewed. Papers describing associations between exposures and exacerbation of pre-existing asthma were not included. Papers were placed into the following predefined categories: secondhand smoke (SHS), inhaled chemicals, damp housing/mould, inhaled allergens, air pollution, domestic combustion, dietary exposures, respiratory virus infection and medications. PARTICIPANTS Children aged up to 9 years. PRIMARY OUTCOMES Diagnosed asthma and wheeze. RESULTS 14,691 abstracts were identified, 207 papers reviewed and 135 included in the present review of which 15 were systematic reviews, 6 were meta-analyses and 14 were intervention studies. There was consistent evidence linking exposures to SHS, inhaled chemicals, mould, ambient air pollutants, some deficiencies in maternal diet and respiratory viruses to an increased risk for asthma (OR typically increased by 1.5-2.0). There was less consistent evidence linking exposures to pets, breast feeding and infant dietary exposures to asthma risk, and although there were consistent associations between exposures to antibiotics and paracetamol in early life, these associations might reflect reverse causation. There was good evidence that exposures to house dust mites (in isolation) was not associated with asthma risk. Evidence from observational and intervention studies suggest that interactions between exposures were important to asthma causation, where the effect size was typically 1.5-3.0. CONCLUSIONS There are many publications reporting associations between environmental exposures and modest changes in risk for asthma in young children, and this review highlights the complex interactions between exposures that further increase risk.
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Affiliation(s)
- S Dick
- Occupational and Environmental Medicine, University of Aberdeen, Aberdeen, UK
| | - A Friend
- Department of Child Health, University of Aberdeen, Aberdeen, UK
| | - K Dynes
- Department of Child Health, University of Aberdeen, Aberdeen, UK
| | - F AlKandari
- Department of Child Health, University of Aberdeen, Aberdeen, UK
| | - E Doust
- Institute of Occupational Medicine, Edinburgh, UK
| | - H Cowie
- Institute of Occupational Medicine, Edinburgh, UK
| | - J G Ayres
- Occupational and Environmental Medicine, University of Aberdeen, Aberdeen, UK
- Environmental and Respiratory Medicine, University of Birmingham, Birmingham, UK
| | - S W Turner
- Department of Child Health, University of Aberdeen, Aberdeen, UK
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Cobo ER, Favetto PH, Lane VM, Friend A, VanHooser K, Mitchell J, BonDurant RH. Sensitivity and specificity of culture and PCR of smegma samples of bulls experimentally infected with Tritrichomonas foetus. Theriogenology 2007; 68:853-60. [PMID: 17681370 DOI: 10.1016/j.theriogenology.2007.06.019] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2007] [Accepted: 06/22/2007] [Indexed: 10/23/2022]
Abstract
The sensitivity (Se) and specificity (Sp) of different testing schemes were estimated for detecting Tritrichomonas foetus (T. foetus) in smegma samples from experimentally infected bulls. Culture and polymerase chain reaction (PCR) on smegma samples were evaluated alone and in parallel testing. Mature dairy bulls (n=79) were intrapreputially inoculated with T. foetus (n=19); Campylobacter (C.) fetus venerealis (n=13); both T. foetus and C. fetus venerealis (n=11); Tetratrichomonas spp. (n=9); C. fetus fetus (n=8); or were not inoculated (n=19). For each bull, smegma samples were collected for 6 week post-inoculation and tested for T. foetus by In Pouch TF culture and PCR. Most T. foetus-inoculated bulls became infected, according to culture (86.7%), PCR (90.0%), and both tests together (93.3%). In T. foetus-inoculated bulls, both tests combined in parallel on a single sample had a Se (78.3%) and Sp (98.5%) similar to two cultures (Se 76.0%, Sp 98.5%) or two PCR (Se 78.0%, Sp 96.7%) sampled on consecutive weeks. The PCR on three consecutive weekly samples (Se 85.0%, Sp 95.4%) and both tests applied in parallel on three consecutive weekly samples (Se 87.5%, Sp 95.6%) were similar to the current gold-standard of six weekly cultures (Se 86.7% and Sp 97.5%). Both tests used in parallel six times had the highest Se (93.3%), with similar Sp (92.5%). Tetratrichomonas spp. were only sporadically detected by culture or PCR. In conclusion, we have proposed alternative strategies for T. foetus diagnostics (for the AI industry), including a combination of tests and repeat testing strategies that may reduce time and cost for bull surveillance.
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Affiliation(s)
- E R Cobo
- Department of Population Health and Reproduction, University of California, Davis, CA 95616, USA
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Ramsay RG, Friend A, Vizantios Y, Freeman R, Sicurella C, Hammett F, Armes J, Venter D. Cyclooxygenase-2, a colorectal cancer nonsteroidal anti-inflammatory drug target, is regulated by c-MYB. Cancer Res 2000; 60:1805-9. [PMID: 10766162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Cyclooxygenase-2 (COX-2) is an important pharmacological target with great promise in the prevention and treatment of colorectal cancer (CRC). The mechanism underlying COX-2 overexpression in CRC is unresolved. On the basis of the coincident high levels of the transcription factor c-MYB and COX-2 in CRC, we hypothesized that c-MYB is a candidate activator of COX-2 transcription. We identified 13 c-Myb binding sites in the human COX-2 promoter. Eight of these sites were moderate to high-affinity DNA binding targets. Promoter studies indicated that c-Myb can activate COX-2 transcription, whereas dominant-negative Myb mediated repression. These data provide the first rational basis for overexpression of COX-2 in CRC and offer an additional potential target for managing this disease.
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Affiliation(s)
- R G Ramsay
- Peter MacCallum Cancer Institute, East Melbourne, Victoria, Australia.
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Murray MB, Smith RI, Friend A, Jarvis PG. Effect of elevated [CO(2)] and varying nutrient application rates on physiology and biomass accumulation of Sitka spruce (Picea sitchensis). Tree Physiol 2000; 20:421-434. [PMID: 12651438 DOI: 10.1093/treephys/20.7.421] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Sitka spruce (Picea sitchensis (Bong.) Carr.) seedlings were supplied with solutions containing nitrogen (N) at 0.1 x or 2 x the optimum rate (low-N and high-N supply, respectively) and grown either outside in a control plot or inside open-top chambers and exposed to ambient (355 &mgr;mol mol(-1)) or elevated (700 &mgr;mol mol(-1)) CO(2) concentration ([CO(2)]). Gas exchange measurements, chlorophyll determinations and nutrient analysis were made on current-year (< 1-year-old) shoots of the upper whorl after the seedlings had been growing in the [CO(2)] treatments for 17 months and the nutrient treatments for 6 months. Total seedling biomass and biomass allocation were assessed at the end of the experiment. Nutrient treatment had a significant effect on the light response curves, irrespective of [CO(2)] or chamber treatment; seedlings supplied with high-N rates had higher net photosynthetic rates than seedlings supplied with low-N rates. The degree of photosynthetic stimulation in response to elevated [CO(2)] was larger in seedlings receiving high-N rates than in seedlings receiving low-N rates. Light-saturated net photosynthesis of seedlings grown and measured in elevated [CO(2)] was 26% higher than that of seedlings grown and measured in ambient [CO(2)]. There was no significant effect of [CO(2)] or chamber treatment on the CO(2) response curves of seedlings receiving High-N supply rates. In contrast, analysis of the CO(2) response curves of seedlings receiving Low-N supply rates showed acclimation to elevated [CO(2)]. Both maximum rate of carboxylation (V(cmax)) and maximum electron transport capacity (J(max)) were lower and J(max)/V(cmax) higher in seedlings in the elevated [CO(2)] treatment. There was no effect of elevated [CO(2)] on stomatal conductance, although it was highly dependent on foliar [N], ranging from ~60 mmol m(-2) s(-1) at ~1.5 g N m(-2) to 200 mmol m(-2) s(-1) at ~5 g N m(-2). In the high-N and low-N treatments, foliar N concentration was 10 and 28% lower in seedlings grown in elevated [CO(2)] than in seedlings grown in ambient [CO(2)], respectively. There was no [CO(2)] effect on foliar phosphorus concentration ([P]). Chlorophyll concentration increased with increasing N supply in all treatments. There was no significant effect of elevated [CO(2)] on specific leaf area. Chlorophyll concentration expressed either on an area or dry mass basis for a given foliar [N] was higher in seedlings grown in elevated [CO(2)] than in seedings grown in ambient [CO(2)]. Elevated [CO(2)] increased total biomass accumulation by 37% in seedlings in the high-N treatment but had no effect in seedlings in the low-N treatment. There was a proportionally bigger allocation of biomass to roots of seedlings in the elevated [CO(2)] + low-N supply rate treatment compared with seedlings in other treatments. This resulted in a reduction in aboveground biomass compared with corresponding seedlings grown in ambient [CO(2)].
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Affiliation(s)
- M. B. Murray
- ITE, Bush Estate, Penicuik, Midlothian EH26 0QB, U.K
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Cumming I, Friend A, Aguma CO. Use of indigenous breeds of cattle and their crosses in Uganda as recipients for imported Bos taurus embryos. Trop Anim Health Prod 1994; 26:119-26. [PMID: 7941028 DOI: 10.1007/bf02239914] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
In July 1991, 29 frozen imported Holstein Friesian embryos were transferred into synchronised recipients in Uganda. Recipient cows and heifers from indigenous breeds of cattle and their crosses in Uganda were used. The project resulted in 17 pregnancies confirmed by rectal palpation at 8 weeks. Twelve live calves were born of which 7 were heifers and 5 were bulls. One heifer calf died at one month of age from East Coast fever. One pregnant recipient died of East Coast fever 2 months before calving. Two recipients aborted in late gestation as a result of trauma incurred during fighting. Two calves were lost as a result of dystocia. The transfer work and calvings were performed at 3 different farms under varying conditions. The 11 surviving animals are being reared on a single unit where growth rates and performance data are being recorded.
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Affiliation(s)
- I Cumming
- Somerset Cattle Breeding Centre, Hort Bridge, Ilminister, Somerset, UK
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Abstract
OBJECTIVE This case-control study attempts to evaluate the psychological impact of witnessing a suicide on high school students. METHOD Twenty-eight high school students witnessed a firearms suicide and the serious injury of another student while riding a school bus. They were assessed 2 months after the event, and their responses were compared with 28 demographically similar adolescents from another community who had not been exposed to suicide. RESULTS The exposed students, when compared with the controls, had higher rates of new-onset anxiety disorder and a trend for increased rates of new-onset post-traumatic stress disorder (PTSD). Within the exposed group, measures of the closeness of the relationship to both the suicide victim and the student who was injured were correlated with the severity of PTSD symptomatology. Within the exposed group, other factors that predisposed to new-onset disorder included family history of affective illness, family history of suicide attempt, and stressful life events occurring in the year before exposure. CONCLUSIONS In combination with the extant literature, this study demonstrates that adolescents who witness a traumatic suicidal death are at risk for the development of psychopathology, specifically, anxiety disorders and PTSD.
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Affiliation(s)
- D A Brent
- Western Psychiatric Institute and Clinic, Pittsburgh, PA 15213
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Brent DA, Perper JA, Moritz G, Allman C, Friend A, Roth C, Schweers J, Balach L, Baugher M. Psychiatric risk factors for adolescent suicide: a case-control study. J Am Acad Child Adolesc Psychiatry 1993; 32:521-9. [PMID: 8496115 DOI: 10.1097/00004583-199305000-00006] [Citation(s) in RCA: 538] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
OBJECTIVE The objective of this study was to determine the psychiatric risk factors for adolescent suicide. METHOD Sixty-seven adolescent suicide victims were compared with 67 demographically matched community controls. Psychiatric disorder was assessed in suicide victims using a psychological autopsy protocol and in controls using similar semistructured psychiatric interviews. Risk factors were quantified by use of the odds ratio (OR), that is, the relative frequency of the occurrence of a given condition in the suicides compared with the controls. RESULTS The most significant psychiatric risk factors associated with adolescent suicide were major depression (OR = 27.0), bipolar mixed state (OR = 9.0), substance abuse (OR = 8.5), and conduct disorder (OR = 6.0). Substance abuse was a more significant risk factor when comorbid with affective illness than when alone (OR = 17.0 versus 3.3). The majority of depressed suicide victims had a primary affective disorder (82%). A significant minority (31%) of depressed suicide victims had been depressed less than 3 months. Previous suicide attempts, suicidal ideation, and homicidal ideation also were associated with adolescent suicide. CONCLUSIONS The development of effective treatments for youth who fit the above-noted risk profiles should be given high priority.
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Affiliation(s)
- D A Brent
- Western Psychiatric Institute and Clinic, Pittsburgh, Pennsylvania 15213
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Brent DA, Perper J, Moritz G, Allman C, Friend A, Schweers J, Roth C, Balach L, Harrington K. Psychiatric effects of exposure to suicide among the friends and acquaintances of adolescent suicide victims. J Am Acad Child Adolesc Psychiatry 1992; 31:629-39. [PMID: 1644725 DOI: 10.1097/00004583-199207000-00009] [Citation(s) in RCA: 62] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The friends and acquaintances (N = 58) of 10 adolescent suicide victims were interviewed 6 months after the death of the victims, and the rates of psychiatric disorders that had onset after the death were compared with the 6-month incidence of psychopathology in 58 demographically and psychiatrically matched unexposed controls. The exposed group showed higher rates of any new onset major depressive disorder, but the rate of incident suicide attempts was the same in both groups. The median onset of incident depression among the exposed group was within the first month after exposure, and the majority of those exposed youth with incident depression were still depressed at interview 6 months after the death. Adolescent friends and acquaintances of suicide victims experience considerable psychiatric morbidity subsequent to exposure to suicide, most consistent with pathological grief.
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Affiliation(s)
- D A Brent
- Western Psychiatric Institute and Clinic, Pittsburgh, PA 15213
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Penneys NS, Friend A, Zhu WY, Leonardi C. Swollen keratinocytes: a histologic marker of unusual human papillomavirus-type infection and immunosuppression. J Cutan Pathol 1992; 19:217-20. [PMID: 1328333 DOI: 10.1111/j.1600-0560.1992.tb01662.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Cutaneous papillomavirus infection is common in patients who are immunosuppressed. We describe swollen keratinocytes in the granular layer in lesions from four patients who had human immunodeficiency virus infection. These cells were similar to those described in skin lesions of epidermodysplasia verruciformis. Amplification of DNA from the lesions revealed an amplimer for human papillomavirus using a consensus primer for a highly conserved region of the L1 open reading frame; however, specific binding was not noted when radiolabelled probes for human papillomavirus types 6, 11, 16, 18, and 33 were used. We conclude that the presence of these distinctive swollen cells strongly suggests immunosuppression and quite possibly infection by a less common papillomavirus type.
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Affiliation(s)
- N S Penneys
- Department of Dermatology, University of Miami School of Medicine, Florida
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Abstract
A simplified procedure for the isolation of NADH dehydrogenase from the inner membrane of ox heart mitochondria is presented which permits relatively rapid preparation of the enzyme in a more stable form than that afforded by published methods. The protein thus isolated displays more than eight different subunits in gel electrophoresis under denaturing conditions, three of which are also present in the "low-molecular-weight form' of the enzyme prepared under more drastic conditions. Complex I contains several subunits, mostly of low molecular weight, not seen in soluble purified NADH dehydrogenase. It is suggested that some of these may be 'binding peptides' necessary in linking NADH dehydrogenase to ubiquinone reduction, analogously to the role of small peptides in linking succinate dehydrogenase to ubiquinone. The dehydrogenase isolated by the rapid method contains equimolar amounts of non-haem iron and labile sulphur, but on further manipulation non-haem iron (but no labile sulphur) is lost, resulting in ratios of S/Fe in excess of unity, as previously reported for preparations isolated by longer procedures.
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Setter LR, Andrew R, Coleman R, Friend A, Markarian C, Story A. Routine surveillance of radioactivity around nuclear facilities. Environ Health Ser Radiol Health 1966; 23:1-28. [PMID: 6003446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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